Hi
I hope this isn't a problem that I borrow your threat.
I was hoping that someone could tell me what would be the best transistor(mosfet) for my amplifier. It's an car amp and ia has 200W on 4 speakers. A friend gave it to me becouse he broke it. I've found the problem (a trasistor was blown). and i want to know what would be the best replacement or even better how much stronger could I make it.
thanks
I hope this isn't a problem that I borrow your threat.
I was hoping that someone could tell me what would be the best transistor(mosfet) for my amplifier. It's an car amp and ia has 200W on 4 speakers. A friend gave it to me becouse he broke it. I've found the problem (a trasistor was blown). and i want to know what would be the best replacement or even better how much stronger could I make it.
thanks
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The transistors on your first picture are Bipolars (not MOSFETs) and they are fakes (no name, Chinese crap ... so this is the reason of failure).
You can't really use a different transistor than the current type, otherwise the bias current would be different and it doesn't seem to be adjustable.
One powerful alternative could be e.g. 2STA2120 and 2STC5948, but I doubt that replacing the bad transistors will really help, because certainly other devices are damaged.
You can't really use a different transistor than the current type, otherwise the bias current would be different and it doesn't seem to be adjustable.
One powerful alternative could be e.g. 2STA2120 and 2STC5948, but I doubt that replacing the bad transistors will really help, because certainly other devices are damaged.
Last edited:
nitroboy:
I'm confused, are these 2SB and 2SD types the originals or not ? They aren't isn't it !!
Regarding the general question of this thread, did someone ever try the following MOSFET pair:
FQA36P15
FQA46N15 from Fairchild
These seem to be rather powerful and robust VMOS (planar stripe) type, which are damn cheap, low Crss and can dissipate at least 250W.
They already worked in a prototype of mine, but I never qualified them any further (measurement and listening wise).
I'm confused, are these 2SB and 2SD types the originals or not ? They aren't isn't it !!
Regarding the general question of this thread, did someone ever try the following MOSFET pair:
FQA36P15
FQA46N15 from Fairchild
These seem to be rather powerful and robust VMOS (planar stripe) type, which are damn cheap, low Crss and can dissipate at least 250W.
They already worked in a prototype of mine, but I never qualified them any further (measurement and listening wise).
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